package com.hmdp.utils;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.util.StrUtil;
import com.hmdp.dto.UserDTO;
import com.hmdp.entity.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.lang.Nullable;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import java.util.Map;
import java.util.concurrent.TimeUnit;

import static com.hmdp.utils.RedisConstants.LOGIN_USER_KEY;
import static com.hmdp.utils.RedisConstants.LOGIN_USER_TTL;


public class LoginInterceptor implements HandlerInterceptor {

//    private final StringRedisTemplate stringRedisTemplate;
//
//
//    public LoginInterceptor(StringRedisTemplate stringRedisTemplate) {
//        this.stringRedisTemplate = stringRedisTemplate;
//    }

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
//        // 1.获取session
////        HttpSession session = request.getSession();
//        // 2.获取session中的用户,包括手机号和昵称
////        Object user = session.getAttribute("user");
//        //1.获取请求头中的token
//        String token = request.getHeader("authorization");
//        if(StrUtil.isBlank(token)){
//            response.setStatus(401);
//            return false;
//        }
//        //2.获取redis中的用户信息
//        Map<Object, Object> userMap = stringRedisTemplate.opsForHash()
//                .entries(LOGIN_USER_KEY+token);
//        // 3.判断用户是否存在
//        if (userMap.isEmpty()) {
//            // 4.不存在，返回未登录结果
//            response.setStatus(401);
//            return false;
//        }
//        //5.存在，将用户信息转换为UserDTO
//        UserDTO userDTO = BeanUtil.fillBeanWithMap(userMap, new UserDTO(), false);
//        //6.保存用户信息到ThreadLocal
//        UserHolder.saveUser(userDTO);
//
//        //7.刷新token有效期
//        stringRedisTemplate.expire(LOGIN_USER_KEY+token,LOGIN_USER_TTL, TimeUnit.MINUTES);
//
//
//
//
//        return true;


        //判断是否需要拦截（ThreadLocal中是否有用户）
        if(UserHolder.getUser() == null){
            //没有，需要拦截，设置状态码为401
            response.setStatus(401);
            return false;
        }
        //由用户则放行

        return true;
    }


    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, @Nullable Exception ex) throws Exception {
        // 移除用户
        UserHolder.removeUser();
    }

}
